step8: You should see that the transparant pieces now look a litle lighter. Put the PCB in the developper (SODA crystals, about 20mg / 1l), this will take about 20 minutes, gently rock the container to speed things a little up. You can rub the surface of the PCB with your finger to remove the dry film a little easier. If you think it is ready (all the copper is visible) leave it in there for a few more minutes just to be sure.

(step8: You should see that the transparant pieces now look a litle lighter. Put the PCB in the developper (SODA crystals, about 20mg / 1l), this will take about 20 minutes, gently rock the container to speed things a little up. You can rub the surface of )

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